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From "Vahid Hashemian (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-3111) java.lang.ArithmeticException: / by zero in ConsumerPerformance
Date Fri, 15 Jan 2016 23:39:39 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-3111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15102699#comment-15102699
] 

Vahid Hashemian commented on KAFKA-3111:
----------------------------------------

I see, thanks. I'm trying to reproduce the issue but have not had any luck yet. I've even
had log lines with the same timestamp and no exception was raised. 

Example:

bin/kafka-consumer-perf-test.sh --zookeeper localhost:2181 --topic topic1 --threads 1 --show-detailed-stats
--reporting-interval 5000 --messages 10001
time, data.consumed.in.MB, MB.sec, data.consumed.in.nMsg, nMsg.sec
2016-01-15 15:06:04:909, 0, 0.0143, 0.2744, 5000, 96153.8462
2016-01-15 15:06:04:914, 0, 0.0286, 3.5763, 10000, 1250000.0000
2016-01-15 15:06:04:914, 0, 0.0286, 0.0001, 10001, 17.5439

Also, this one with smaller number of messages to process:

bin/kafka-consumer-perf-test.sh --zookeeper localhost:2181 --topic topic1 --threads 1 --show-detailed-stats
--reporting-interval 1 --messages 10
time, data.consumed.in.MB, MB.sec, data.consumed.in.nMsg, nMsg.sec
2016-01-15 15:36:48:262, 0, 0.0000, 0.0003, 1, 333.3333
2016-01-15 15:36:48:264, 0, 0.0000, Infinity, 2, Infinity
2016-01-15 15:36:48:264, 0, 0.0000, NaN, 3, Infinity
2016-01-15 15:36:48:265, 0, 0.0000, Infinity, 4, Infinity
2016-01-15 15:36:48:265, 0, 0.0000, Infinity, 5, Infinity
2016-01-15 15:36:48:265, 0, 0.0000, Infinity, 6, Infinity
2016-01-15 15:36:48:271, 0, 0.0000, Infinity, 7, Infinity
2016-01-15 15:36:48:271, 0, 0.0000, Infinity, 8, Infinity
2016-01-15 15:36:48:271, 0, 0.0000, Infinity, 9, Infinity
2016-01-15 15:36:48:271, 0, 0.0000, Infinity, 10, Infinity
2016-01-15 15:36:48:272, 0, 0.0000, 0.0000, 10, 0.0000


> java.lang.ArithmeticException: / by zero in ConsumerPerformance
> ---------------------------------------------------------------
>
>                 Key: KAFKA-3111
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3111
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 0.9.0.0
>            Reporter: Jun Rao
>              Labels: newbie
>
> Saw the following error. If there are lots of unconsumed messages, between two iterations
of the consumption, the timestamp may not have changed.
> kafka-consumer-perf-test --zookeeper localhost:2181 --topic test --group test-group --threads
1 --show-detailed-stats --reporting-interval 5000
> 2016-01-13 09:12:43:905, 0, 1048576, 35.2856, 238.4186, 370000, 2500000.0000
> 2016-01-13 09:12:43:916, 0, 1048576, 35.7624, 47.6837, 375000, 500000.0000
> java.lang.ArithmeticException: / by zero
>         at kafka.tools.ConsumerPerformance$ConsumerPerfThread.printMessage(ConsumerPerformance.scala:189)
>         at kafka.tools.ConsumerPerformance$ConsumerPerfThread.run(ConsumerPerformance.scala:164)
> 2016-01-13 09:12:43:918, 0, 1048576, 36.2393, 0.7117, 380000, 7000.0000



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